Process of producing flat-molded sound-records.



No. 82am,

` PRUCESS FOR RO'JUGING FLAT MLDED PATENTED AUG. 3.4, 1906.

SGUND RECORDS,

APPLIOATION FILED JUNE 0.1903.

i 2/ ximg Q www www also forms a guide for the marian srrijrilis "1 LLIA M H. HOYT, OF W YOi.

PROCESS FOR PRODUCING FL ill NG, NEW JERSEY.

,QT-,MOLDED SOUND-RECORDS.

No. 828,604. Speccation of Letter-s Patent. Patented Aug'. 14, ieee.

Application filed June 9, 1903. Serial No. 160.733.

To all whom it may concern:

Be it known that I, WILLrAM H. HoYT, a' citizen of the United States, and a resident of Wyoming, in the county of Essex and State of New Jersey, have invented'certain new and useful Improvements iiiProcesses for Producing Flat-Molded Sound-Records, of which the following is a specification.

My invention relates to the manufacture of molded disk records, such as are used for some talking-machines.

The object of my invention is to provide an improved process lof producing such records, whereby they will be given great strength and durability. v

In the accompanying drawings i have illustrated an apparatus such as may be used in producing a talking-machine record accord ing to my invention, Figure l being a sectional elevation of such apparatus with the record in process of formation, and Fig. 2 is a l cross-section of the completedV article. l

The apparatus, for which I do not claim any novelty in the present application, consists of a body A, provided with a pin B for centering the matrix-disk C and -the'bushing I D, which l prefer to employ as a lining at the l central aperture of the record. The pin B pressure-plate E, which is adapted to engage the upper surface of the record in process of molding same.

E is a pin for reducing the customary eccentric recesses l* in the record F. l

Hitherto it has been customary to make the record from a homogeneous plastic coinposition, which was molded by being pressed into the irregularities upon the upper surface of the matrix C. According to my present invention after preparing a suitable plastic mixture and putting the same in a viscid or molten condition into a heated mold on top of the matrix disk C, as indicated at F2, I l superimpose a backing of suitable material l such as linen, cardboard, or papier-mch l board-and then put this mold and the con tents in a hydraulic or other press to force thc'top plate E against the material for the record; The composition or lastic mass should form only a comparatively thin layer, the thickness r!" the backing being much;

plastic greater than that of the composition, which` vthe adjacent portion of the backing F3 as well. This is shown with particular clearness in Fig, 2. The connection of the facing With the backing is thus rendered very strong, inasmuch as the said elenientsare provided with interlocking projections.

The article resulting from the above-described process can be made considerably thinner than a record made exclusively from plastic composition and is much lighter in weight, stronger, and more durable than similar articles as produced hitherto.

l/Vhile pressure is being applied to mold the article l also cool the plastic mass, as by water circulation, sfo as to bring about a rapid hardening and solidiiicaticn of the mass.

I claim my invention-"- i. The herein-described process of pro` ducing llatmolded sound-records, which conj. sists in interposing a thin, substantially plane yielding, less plastic lcstio facing between a backing and a substantially flat record-ma trix, and exerting pressure so as to impress the irregularities of the matrix not only into the facing, but into the adjacent portion of the backing.

2. The herein-described process of producing fiat-molded sound-records, which consists in interposing, under the application of heat, a thin substantially less plastic backing of materially greater thickness than said. facing, and then applying a cooling influence to cause the facing to harden, and at the same time pressure lto cause the irregularities of the 'matrix to impress themselves into the facing and into the arijacent ortions of the backing.

3. T ie herein-described process of producing 'Hat-molded sound-records, which consists in applying a thin, substantially plane plastic facing on top of a flat record-matrix, then ap lying a yielding, non-brittle and less acking on top of said facing, ing a downward pressure to the backing so as plane plastic facing' between a fiat record-'matrix and a yielding,

applyy ICO 1 the facing, under the n'uence or wim/vw M Liles of the maturi, and the Ten ur'vce in, ties @fr the matrix, to' :www m tics. which am impressed mtu the l :e mid 'muking and. than solid'fying tha facing) n irmnoving the pressure. 

